Bitcoin can be as securely stored as you want. If you want the best security, then you can opt to choose for something like a hardware wallet. In case of the trezor hardware wallet, even if you happen to make use of it through an infected pc, then it will still guarantee that your security can't be breached. This will make sure that only YOU will have access to your coins, and not a hacker.
That's not really a good argument. There are plenty of examples of how a safe can be opened with the right tools. It will only cost them a certain amount of time depending on how the safe is engineered. Plus it's an obvious object that stands out and screams 'Hey! Here am I!!'.
I disagree with that. In your quarters (just like in mine) there may be no such device as a safe room but in the countries and parts of the world (say, Florida) where hurricanes and tornadoes are quite common (and houses are built from shit at that), these are widespread and mostly used as a personal shelter in case of such and similar disasters. And you can store not only gold there but a good arsenal as well
Usually, possession of gold is well correlated with possession of guns
Other than that, how would you know that there is such a safe room at all (I mean before breaking into the house)?